CA1247209A - Compteurs a affichage enregistre code pour detecter les trafiquages - Google Patents
Compteurs a affichage enregistre code pour detecter les trafiquagesInfo
- Publication number
- CA1247209A CA1247209A CA000490593A CA490593A CA1247209A CA 1247209 A CA1247209 A CA 1247209A CA 000490593 A CA000490593 A CA 000490593A CA 490593 A CA490593 A CA 490593A CA 1247209 A CA1247209 A CA 1247209A
- Authority
- CA
- Canada
- Prior art keywords
- display
- light
- meter
- measuring
- angular position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/22—Analogue/digital converters pattern-reading type
- H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Optical Transform (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/650,151 US4665359A (en) | 1984-09-13 | 1984-09-13 | Method and apparatus for detecting tampering with a meter having an encoded register display |
US650,151 | 1991-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1247209A true CA1247209A (fr) | 1988-12-20 |
Family
ID=24607696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000490593A Expired CA1247209A (fr) | 1984-09-13 | 1985-09-12 | Compteurs a affichage enregistre code pour detecter les trafiquages |
Country Status (2)
Country | Link |
---|---|
US (1) | US4665359A (fr) |
CA (1) | CA1247209A (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5113130A (en) * | 1990-04-05 | 1992-05-12 | General Electric Company | Testing operation of electric energy meter optics system |
US5293115A (en) * | 1991-08-06 | 1994-03-08 | Schlumberger Industries, Inc. | Method and system for sensing removal of a utility meter from its socket |
US5874731A (en) * | 1995-03-20 | 1999-02-23 | Schlumberger Industries, Inc. | Ambient light filter |
US5750983A (en) * | 1995-03-20 | 1998-05-12 | Schlumberger Industries, Inc. | Meter sensor light tamper detector |
DE19728313A1 (de) * | 1997-07-03 | 1999-01-07 | Zf Luftfahrttechnik Gmbh | Drehwinkelsensor |
US7775422B2 (en) | 2003-06-13 | 2010-08-17 | Arad Measuring Technologies Ltd. | Meter register and remote meter reader utilizing a stepper motor |
US7267014B2 (en) * | 2004-09-23 | 2007-09-11 | Arad Measuring Technologies Ltd. | Meter register having an encoder |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3846788A (en) * | 1971-03-26 | 1974-11-05 | Automated Technology Corp | Polydecade decimal to digital encoder |
US3833901A (en) * | 1972-08-28 | 1974-09-03 | Little Inc A | Magnetic compass having remote digital readout |
DE2335942C2 (de) * | 1973-07-14 | 1982-06-16 | Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln | Optischer digitaler Winkelcodierer |
US4104588A (en) * | 1977-01-28 | 1978-08-01 | Wyman Westberry | Tamper prevention apparatus for watt-hour meter |
US4190767A (en) * | 1978-06-26 | 1980-02-26 | Trw Inc. | Optical encoder apparatus |
US4264897A (en) * | 1979-06-13 | 1981-04-28 | General Electric Company | Meter register encoder including electronics providing remote reading capability |
US4321531A (en) * | 1979-09-17 | 1982-03-23 | Sangamo-Weston Inc. | Direction sensitive pulse initiator for a wattmeter |
JPS57136118A (en) * | 1981-02-17 | 1982-08-23 | Ricoh Co Ltd | Setting of phase difference in two sets of pulse trains of rotary encoder |
US4422026A (en) * | 1981-12-31 | 1983-12-20 | Bell & Howell Company | Servo control arrangement utilizing alternately energized light sources and a single photodetector |
US4472629A (en) * | 1982-02-09 | 1984-09-18 | Xerox Corporation | Optical encoder improvement |
US4475034A (en) * | 1982-06-24 | 1984-10-02 | International Business Machines Corporation | Modular shaft encoder |
US4514683A (en) * | 1982-09-30 | 1985-04-30 | Deibert Richard L | Tamper indicating and theft preventing electrical meter |
EP0124434A1 (fr) * | 1983-04-29 | 1984-11-07 | Sangamo Weston, Inc. | Appareil d'affichage d'information optique décodé avec un indicateur de fraude |
GB8403457D0 (en) * | 1984-02-09 | 1984-03-14 | Thorn Emi Dynatel Ltd | Meters |
-
1984
- 1984-09-13 US US06/650,151 patent/US4665359A/en not_active Expired - Fee Related
-
1985
- 1985-09-12 CA CA000490593A patent/CA1247209A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US4665359A (en) | 1987-05-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |